Re: anyone have a 257 wby mag ?
I have one. Its a custom built on a Remington 700 action with a Shilen SS barrel. When first built it had a 26" barrel. I didnt like it with the long barrel so I took the gun and a hacksaw to the range and started shortning it 1" at a time. I would have to look back in my reloading records, but I think I lost around 100 FPS by taking it down to 23".
That said, Just because I had these results doesnt mean you will too. There are just to many variables. When I cut my barrel everything else was equal; load/temp ect.
Right now with a 23" barrel I am getting 3565 FPS with 100 gr. Barnes TSX. I have shot a few deer with this bullet with no problems. I have also shot 100gr. Ballistic Tips, 100 gr. Barnes X-bullet (original version), 115 gr. Patitions out of this gun.
I am going to try the new 80 gr. Barnes TTSX next. This bullet should hit 3900+ FPS. If it is accurate I will try it on deer next season.
Good luck, Tony